I want users to have to fill in a captcha to comment.
我希望用户必须要回答captcha才能写注释。
I see at wordspy.com the first citation for captcha is October 2002.
我在wordspy.com看到的第一条captcha的引文是在2002年十月份。
That string of letters has a name; it's called a CAPTCHA. And it's a test.
这串字母叫做CAPTCHA，它是一个测试。
Fend them off with more generic error messages and possibly require to enter a CAPTCHA.
用更通用的错误信息来阻断这种攻击，可能需要输入一个验证码。
For many, it comes as little surprise that algorithms can now nearly always beat a CAPTCHA.
对许多人来说，这种程序现在几乎能击败验证码程序，也算是一个小小的惊喜吧！
A CAPTCHA is a challenge-response test to determine that the response is not generated by a computer.
—一个验证码是质问-响应的测试以便于确定这个响应是不是被一个计算机产生的。
Moreover, you can require to enter a CAPTCHA after a number of failed logins from a certain IP address.
此外，在某一个ip地址多次登陆失败之后你可以要求输入一个验证码。
Even better, the system has proved to be far better at resisting attacks than other types of CAPTCHA.
更妙的是，这一系统已经证明其在抵御攻击方面比其他类型的验证码具有更加卓越的性能。
Readers might have noticed that both of Google's CAPTCHA systems suddenly become more difficult to parse.
读者可能已经注意到Google的CAPTCHA系统突然变得更难识别。
He gives an example: a CAPTCHA in which each letter was always formed out of the same number of pixels.
他举了一个例子：在一个验证码中，每个字母都是由一定数量的像素组成的。
If you've signed up for any sort of online service there is a high likelihood you're very familiar with CAPTCHA.
如果您曾经需要在线注册任何形式的网上服务，你很可能已经熟悉了CAPTCHA。
The point of the CAPTCHA is that reading those swirly letters is something that computers aren't very good at.
该测试的重点在于，对于计算机来说，它们不善于辨识这些纠结的字母。
A CAPTCHA is a program that can generate and grade tests that humans can pass but current computer programs cannot.
一个CAPTCHA程序能够生成一些人类能通过，但是目前的计算机却无法通过的测试。
Perhaps Captcha or another security measure to prevent such spamming will be instituted to prevent any such issues.
也许通过验证码或其他措施可以有效防止类似问题。
Try advancing the captcha arms race through measured click-hold times for your Web authentication applications.
尝试通过为We b验证应用程序测量单击按住时间，进一步推动captcha技术。
Spammers use optical character recognition to defeat CAPTCHA, so there is usually significant distortion to the images.
垃圾信息散布者常常会使用视觉字符识别来破解CAPTCHA，所以通常我们需要严重歪曲这些图像。
Each unknown word is presented as a CAPTCHA several times, to different users, to ensure that it has been read correctly.
每一个未知词作为验证码呈现给不同用户数次，确保它被正确辨认。
So all I had to do when the signup screen loaded was enter a number before the @ sign in email, enter the captcha, and click signup.
于是，我要做的就是，当注册页面出现时，在邮件地址“@yourdomain.com” 前面加上一个数字以及输入验证码，然后点击“现在注册”按钮。
Try advancing the captcha arms race through measured keystroke press and release times for your web authentication applications.
通过在Web身份验证应用程序中测量击键按下和释放时间，进一步推动captcha竞赛。
The biggest flaw with all CAPTCHA systems is that they are, by definition, susceptible to attack by humans who are paid to solve them.
所有的CAPTCHA验证系统都有一个最大的瑕疵：顾名思义，它们在人类本身的进攻面前不堪一击，有人付款给这些人破解它们。
Even if those Numbers exaggerate the system's efficacy tenfold, though, it would still represent a significant blow to the CAPTCHA model.
即便这些结果是实际系统效用的10倍，也仍然是对CAPTCHA模式的一记重击。
When its scanners find a word they can't read, they automatically turn it into a CAPTCHA that gets exported to a website in need of one.
当扫描仪发现无法识别的单词时，它就自动地将其转变为验证码，并将其发布到网页上需要的位置。
To validate the captcha we need to save the random text written to the captcha image somewhere and then check it at the form submission time.
为了对验证码进行检验，我们需要将验证码中的文本保存起来，然后在提交的时候进行检查是否一致。
Their assorted techniques recognise anywhere between half and nearly all letters and numbers, depending on the particular CAPTCHA algorithm in use.
根据具体使用的CAPTCHA算法，他们的分类技术对数字和字母的识别率可以达到50%至将近100%之间。
Once you've read the information on the page you have to enter your password a captcha code and then confirm that you want to delete your account.
当你需要阅读网页的信息时，你必须输入法密码、验证码，然后确认页面上你想要删除的信息。
“If the benefit a spammer is getting from obtaining an e-mail account is less than $3 per 1,000, then CAPTCHA is doing a perfect job,” says Dr von Ahn.
vonAhn博士说:“如果一个司盘客获取一个邮箱账号得到的钱少于千分之三美元，那么验证码系统的效果就恰到好处了。”
“If the benefit a spammer is getting from obtaining an e-mail account is less than $3 per 1,000, then CAPTCHA is doing a perfect job,” says Dr von Ahn.
vonAhn博士说:“如果一个司盘客获取一个邮箱账号得到的钱少于千分之三美元，那么验证码系统的效果就恰到好处了。”
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